Havana was the capital city of Cuba.
In 1895, Winston Churchill visited Havana. (PROSE: The Lost Diaries of Winston Spencer Churchill; AUDIO: Young Winston)
The city hosted the 2044 Olympic Games. (TV: The Waters of Mars)
The Sixth Doctor promised Evelyn Smythe that he would go to Mexico or Havana to pick up some specialty chocolate for her to use if she agreed to travel with him. (AUDIO: The Marian Conspiracy)
At some point in the 21st century, the Doctor attended Fidel Castro's funeral in Havana. (PROSE: Revolution Man)